<template>
  <div>
    <Breadcrumb :bread-item-name="['商品管理','参数列表']"></Breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-alert
              title="注意:只允许第三级分类设置相关参数"
              type="warning"
              closable
              show-icon>
          </el-alert>
        </el-col>
      </el-row>
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <el-cascader
              v-model="selectedCateKeys"
              :options="catelist"
              :props="cateProps"
              @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <el-row>
        <el-col>
          <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <el-tab-pane label="动态参数" name="many">
              <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数
              </el-button>
              <!--              动态参数表格-->
              <el-table :data="manyTableData" border stripe>
                <!--                展开行-->
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i"
                            closable @close="handleClose(i,scope.row)">
                      {{item}}
                    </el-tag>
                    <!--                    输入文本框-->
                    <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                    >
                    </el-input>
                    <!--                    添加的按钮-->
                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)"
                    >+ New Tag
                    </el-button>
                  </template>
                </el-table-column>
                <!--                索引列-->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                    <el-button type="primary" size="mini" icon="el-icon-edit"
                               @click="showEditDialog(scope.row.attr_id)">编辑
                    </el-button>
                    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">
                      删除
                    </el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
            <el-tab-pane label="静态属性" name="only">
              <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性
              </el-button>
              <el-table :data="onlyTableData" border stripe>
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i"
                            closable @close="handleClose(i,scope.row)">
                      {{item}}
                    </el-tag>
                    <!--                    输入文本框-->
                    <el-input
                        class="input-new-tag"
                        v-if="scope.row.inputVisible"
                        v-model="scope.row.inputValue"
                        ref="saveTagInput"
                        size="small"
                        @keyup.enter.native="handleInputConfirm(scope.row)"
                        @blur="handleInputConfirm(scope.row)"
                    >
                    </el-input>
                    <!--                    添加的按钮-->
                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)"
                    >+ New Tag
                    </el-button>
                  </template>
                </el-table-column>
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                    <el-button type="primary" size="mini" icon="el-icon-edit"
                               @click="showEditDialog(scope.row.attr_id)">编辑
                    </el-button>
                    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">
                      删除
                    </el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
          </el-tabs>
        </el-col>
      </el-row>
    </el-card>
    <!--    添加参数的对话框-->
    <el-dialog
        :title="'添加'+titleText"
        :visible.sync="addDialogVisible"
        width="40%"
        @close="addDialogClosed"
    >
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
    </el-dialog>
    <!--    修改参数的对话框-->
    <el-dialog
        :title="'修改'+titleText"
        :visible.sync="editDialog.editDialogVisible"
        width="40%"
        @close="editDialogClosed"
    >
      <el-form :model="editDialog.editForm" :rules="editDialog.editFormRules"
               ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editDialog.editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialog.editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
import Breadcrumb from '@/components/Breadcrumb'

export default {
  name: 'Params',
  data() {
    return {
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      },
      editDialog: {
        editDialogVisible: false,
        editForm: {},
        editFormRules: {
          attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
        }
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      let { data: res } = await this.$http.get('/categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.catelist = res.data
    },
    handleChange() {
      this.getParamsData()
    },
    //Tab Click Handle FN
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    //获取参数的列表数据
    async getParamsData() {
      //证明选中的不是3级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      //证明选中的是三级分类
      let { data: res } = await this.$http.get(`/categories/${this.cateId}/attributes`,
        { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      console.log(res.data)
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        //控制文本框的显示与隐藏
        item.inputVisible = false
        //文本框输入的值
        item.inputValue = ''
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮添加参数
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        let { data: res } =
          await this.$http.post(`/categories/${this.cateId}/attributes`, {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          })
        if (res.meta.status !== 201) return this.$message.error('添加参数失败')
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    //重置修改的表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog(attr_id) {
      let { data: res } = await this.$http.get(`/categories/${this.cateId}/attributes/${attr_id}`,
        {
          params: {
            attr_sel: this.activeName
          }
        })
      if (res.meta.status !== 200) return this.$message.error('获取参数信息失败')
      this.editDialog.editForm = res.data
      this.editDialog.editDialogVisible = true
    },
    //  点击按钮修改参数信息
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        let { data: res } = await this.$http.put(`/categories/${this.cateId}/attributes/${this.editDialog.editForm.attr_id}`,
          {
            attr_name: this.editDialog.editForm.attr_name,
            attr_sel: this.activeName
          })
        if (res.meta.status !== 200) return this.$message.error('修改失败')
        this.$message.success('修改成功')
        this.getParamsData()
        this.editDialog.editDialogVisible = false
      })
    },
    //  根据id删除对应的参数
    async removeParams(attr_id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
      //用户取消操作
      if (confirmResult !== 'confirm') {
        return
      }
      //删除业务
      let { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) return this.$message.error('删除参数失败')
      this.$message.success('删除参数成功')
      this.getParamsData()
    },
    //文本框失去焦点或者按下enter键都会触发
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrValues(row)
    },
    async saveAttrValues(row) {
      let { data: res } = await this.$http.put(`/categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) return this.$message.error('修改参数项失败')
      this.$message.success('修改参数项成功!')
    },
    showInput(row) {
      row.inputVisible = true
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrValues(row)
    }
  },
  computed: {
    //按钮的启用与禁用,如果选中了三级分类就可以用
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    //  当前选中三级分类的id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  },
  components: {
    Breadcrumb
  }
}
</script>

<style scoped>
  .cat_opt {
    margin: 15px 0px;
  }

  .el-tag {
    margin: 0px 10px;
  }

  .input-new-tag {
    width: 120px;
  }
</style>